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Issue #1230 - Part 1: Fix Back-computing percentages for intrinsic sizing in Layout CSS-Grid

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List of relevant patches applied:

1398537 part 2 - [css-multicol] Implement percentages for 'column-gap' (Gecko part).

1434478 part 1 - [css-grid] Stop back-computing percentage grid gaps when the percentage basis is indefinite. Treat them as zero sized instead.

1434478 part 2 - Stop back-computing percentage padding/margin when the percentage basis is indefinite. Treat them as zero sized instead.

1434478 part 3 - Remove IntrinsicISizeOffsetData::hPctPadding/hPctMargin members since they are now unused.

1434478 part 4 - Factor out constants like NS_UNCONSTRAINEDSIZE so they can be used in headers without needing nsIFrame.h (idempotent patch).

1434478 part 5 - Create nsLayoutUtils::ResolveToLength for resolving CSS <length-percentage> (idempotent patch).

1434478 part 6 - Propagate a percentage basis to nsIFrame::IntrinsicISizeOffsets for resolving padding/margin.

This is needed only for CSS Grid since in other cases we're only using IntrinsicISizeOffsets in the inline-axis and the percentage basis is always indefinite for *intrinsic sizing*. When calculating the intrinsic size of grid items in the grid container's block axis however, we do have a definite size for the grid area in the inline-axis and it should be used per: https://drafts.csswg.org/css-grid/#algo-overview "2. Next, the track sizing algorithm resolves the sizes of the grid rows, using the grid column sizes calculated in the previous step." (Percentage padding/margin for grid items is always resolved against the grid area's inline-size nowadays.)
This commit is contained in:
Gaming4JC 2019-09-28 23:36:05 -04:00 • committed by Roy Tam
commit e4c397f0d9
16 changed files with 240 additions and 319 deletions
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19
layout/generic/nsColumnSetFrame.cpp
View file

@ -183,18 +183,15 @@ nsColumnSetFrame::GetAvailableContentBSize(const ReflowInput& aReflowInput)
static nscoord
GetColumnGap(nsColumnSetFrame* aFrame,
const nsStyleColumn* aColStyle)
const nsStyleColumn* aColStyle,
nscoord aPercentageBasis)
{
if (eStyleUnit_Normal == aColStyle->mColumnGap.GetUnit())
const auto& columnGap = aColStyle->mColumnGap;
if (columnGap.GetUnit() == eStyleUnit_Normal) {
return aFrame->StyleFont()->mFont.size;
if (eStyleUnit_Coord == aColStyle->mColumnGap.GetUnit()) {
nscoord colGap = aColStyle->mColumnGap.GetCoordValue();
NS_ASSERTION(colGap >= 0, "negative column gap");
return colGap;
}
NS_NOTREACHED("Unknown gap type");
return 0;
return nsLayoutUtils::ResolveGapToLength(columnGap, aPercentageBasis);
}
nsColumnSetFrame::ReflowConfig
@ -227,7 +224,7 @@ nsColumnSetFrame::ChooseColumnStrategy(const ReflowInput& aReflowInput,
colBSize = std::min(colBSize, aReflowInput.ComputedMaxBSize());
}
nscoord colGap = GetColumnGap(this, colStyle);
nscoord colGap = GetColumnGap(this, colStyle, aReflowInput.ComputedISize());
int32_t numColumns = colStyle->mColumnCount;
// If column-fill is set to 'balance', then we want to balance the columns.
@ -403,7 +400,7 @@ nsColumnSetFrame::GetMinISize(nsRenderingContext *aRenderingContext)
// include n-1 column gaps.
colISize = iSize;
iSize *= colStyle->mColumnCount;
nscoord colGap = GetColumnGap(this, colStyle);
nscoord colGap = GetColumnGap(this, colStyle, NS_UNCONSTRAINEDSIZE);
iSize += colGap * (colStyle->mColumnCount - 1);
// The multiplication above can make 'width' negative (integer overflow),
// so use std::max to protect against that.
@ -424,7 +421,7 @@ nsColumnSetFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
nscoord result = 0;
DISPLAY_PREF_WIDTH(this, result);
const nsStyleColumn* colStyle = StyleColumn();
nscoord colGap = GetColumnGap(this, colStyle);
nscoord colGap = GetColumnGap(this, colStyle, NS_UNCONSTRAINEDSIZE);
nscoord colISize;
if (colStyle->mColumnWidth.GetUnit() == eStyleUnit_Coord) {

89
layout/generic/nsFrame.cpp
View file

@ -4515,68 +4515,44 @@ nsIFrame::InlinePrefISizeData::ForceBreak()
mSkipWhitespace = true;
}
static void
AddCoord(const nsStyleCoord& aStyle,
nsIFrame* aFrame,
nscoord* aCoord, float* aPercent,
bool aClampNegativeToZero)
static nscoord
ResolveMargin(const nsStyleCoord& aStyle, nscoord aPercentageBasis)
{
switch (aStyle.GetUnit()) {
case eStyleUnit_Coord: {
NS_ASSERTION(!aClampNegativeToZero || aStyle.GetCoordValue() >= 0,
"unexpected negative value");
*aCoord += aStyle.GetCoordValue();
return;
}
case eStyleUnit_Percent: {
NS_ASSERTION(!aClampNegativeToZero || aStyle.GetPercentValue() >= 0.0f,
"unexpected negative value");
*aPercent += aStyle.GetPercentValue();
return;
}
case eStyleUnit_Calc: {
const nsStyleCoord::Calc *calc = aStyle.GetCalcValue();
if (aClampNegativeToZero) {
// This is far from ideal when one is negative and one is positive.
*aCoord += std::max(calc->mLength, 0);
*aPercent += std::max(calc->mPercent, 0.0f);
} else {
*aCoord += calc->mLength;
*aPercent += calc->mPercent;
}
return;
}
default: {
return;
}
if (aStyle.GetUnit() == eStyleUnit_Auto) {
return nscoord(0);
}
return nsLayoutUtils::ResolveToLength<false>(aStyle, aPercentageBasis);
}
static nscoord
ResolvePadding(const nsStyleCoord& aStyle, nscoord aPercentageBasis)
{
return nsLayoutUtils::ResolveToLength<true>(aStyle, aPercentageBasis);
}
static nsIFrame::IntrinsicISizeOffsetData
IntrinsicSizeOffsets(nsIFrame* aFrame, bool aForISize)
IntrinsicSizeOffsets(nsIFrame* aFrame, nscoord aPercentageBasis, bool aForISize)
{
nsIFrame::IntrinsicISizeOffsetData result;
WritingMode wm = aFrame->GetWritingMode();
const nsStyleMargin* styleMargin = aFrame->StyleMargin();
const auto& margin = aFrame->StyleMargin()->mMargin;
bool verticalAxis = aForISize == wm.IsVertical();
AddCoord(verticalAxis ? styleMargin->mMargin.GetTop()
: styleMargin->mMargin.GetLeft(),
aFrame, &result.hMargin, &result.hPctMargin,
false);
AddCoord(verticalAxis ? styleMargin->mMargin.GetBottom()
: styleMargin->mMargin.GetRight(),
aFrame, &result.hMargin, &result.hPctMargin,
false);
if (verticalAxis) {
result.hMargin += ResolveMargin(margin.GetTop(), aPercentageBasis);
result.hMargin += ResolveMargin(margin.GetBottom(), aPercentageBasis);
} else {
result.hMargin += ResolveMargin(margin.GetLeft(), aPercentageBasis);
result.hMargin += ResolveMargin(margin.GetRight(), aPercentageBasis);
}
const nsStylePadding* stylePadding = aFrame->StylePadding();
AddCoord(verticalAxis ? stylePadding->mPadding.GetTop()
: stylePadding->mPadding.GetLeft(),
aFrame, &result.hPadding, &result.hPctPadding,
true);
AddCoord(verticalAxis ? stylePadding->mPadding.GetBottom()
: stylePadding->mPadding.GetRight(),
aFrame, &result.hPadding, &result.hPctPadding,
true);
const auto& padding = aFrame->StylePadding()->mPadding;
if (verticalAxis) {
result.hPadding += ResolvePadding(padding.GetTop(), aPercentageBasis);
result.hPadding += ResolvePadding(padding.GetBottom(), aPercentageBasis);
} else {
result.hPadding += ResolvePadding(padding.GetLeft(), aPercentageBasis);
result.hPadding += ResolvePadding(padding.GetRight(), aPercentageBasis);
}
const nsStyleBorder* styleBorder = aFrame->StyleBorder();
if (verticalAxis) {
@ -4606,22 +4582,21 @@ IntrinsicSizeOffsets(nsIFrame* aFrame, bool aForISize)
result.hPadding =
presContext->DevPixelsToAppUnits(verticalAxis ? padding.TopBottom()
: padding.LeftRight());
result.hPctPadding = 0;
}
}
return result;
}
/* virtual */ nsIFrame::IntrinsicISizeOffsetData
nsFrame::IntrinsicISizeOffsets()
nsFrame::IntrinsicISizeOffsets(nscoord aPercentageBasis)
{
return IntrinsicSizeOffsets(this, true);
return IntrinsicSizeOffsets(this, aPercentageBasis, true);
}
nsIFrame::IntrinsicISizeOffsetData
nsIFrame::IntrinsicBSizeOffsets()
nsIFrame::IntrinsicBSizeOffsets(nscoord aPercentageBasis)
{
return IntrinsicSizeOffsets(this, false);
return IntrinsicSizeOffsets(this, aPercentageBasis, false);
}
/* virtual */ IntrinsicSize

3
layout/generic/nsFrame.h
View file

@ -261,7 +261,8 @@ public:
InlineMinISizeData *aData) override;
virtual void AddInlinePrefISize(nsRenderingContext *aRenderingContext,
InlinePrefISizeData *aData) override;
virtual IntrinsicISizeOffsetData IntrinsicISizeOffsets() override;
IntrinsicISizeOffsetData
IntrinsicISizeOffsets(nscoord aPercentageBasis = NS_UNCONSTRAINEDSIZE) override;
virtual mozilla::IntrinsicSize GetIntrinsicSize() override;
virtual nsSize GetIntrinsicRatio() override;

180
layout/generic/nsGridContainerFrame.cpp
View file

@ -8,8 +8,8 @@
#include "nsGridContainerFrame.h"
#include <algorithm> // for std::stable_sort
#include <limits>
#include <stdlib.h> // for div()
#include "mozilla/CSSAlignUtils.h"
#include "mozilla/dom/GridBinding.h"
#include "mozilla/Function.h"
@ -127,43 +127,6 @@ ResolveToDefiniteSize(const nsStyleCoord& aCoord, nscoord aPercentBasis)
nsRuleNode::ComputeCoordPercentCalc(aCoord, aPercentBasis));
}
static bool
GetPercentSizeParts(const nsStyleCoord& aCoord, nscoord* aLength, float* aPercent)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Percent:
*aLength = 0;
*aPercent = aCoord.GetPercentValue();
return true;
case eStyleUnit_Calc: {
nsStyleCoord::Calc* calc = aCoord.GetCalcValue();
*aLength = calc->mLength;
*aPercent = calc->mPercent;
return true;
}
default:
return false;
}
}
static void
ResolvePercentSizeParts(const nsStyleCoord& aCoord, nscoord aPercentBasis,
nscoord* aLength, float* aPercent)
{
MOZ_ASSERT(aCoord.IsCoordPercentCalcUnit());
if (aPercentBasis != NS_UNCONSTRAINEDSIZE) {
*aLength = std::max(nscoord(0),
nsRuleNode::ComputeCoordPercentCalc(aCoord,
aPercentBasis));
*aPercent = 0.0f;
return;
}
if (!GetPercentSizeParts(aCoord, aLength, aPercent)) {
*aLength = aCoord.ToLength();
*aPercent = 0.0f;
}
}
// Synthesize a baseline from a border box. For an alphabetical baseline
// this is the end edge of the border box. For a central baseline it's
// the center of the border box.
@ -1172,7 +1135,7 @@ struct nsGridContainerFrame::TrackSizingFunctions
return 1;
}
nscoord repeatTrackSize = 0;
// Note that the repeat() track size is included in |sum| in this loop.
// Note that one repeat() track size is included in |sum| in this loop.
nscoord sum = 0;
const nscoord percentBasis = aSize;
for (uint32_t i = 0; i < numTracks; ++i) {
@ -1189,54 +1152,31 @@ struct nsGridContainerFrame::TrackSizingFunctions
}
nscoord trackSize = ::ResolveToDefiniteSize(*coord, percentBasis);
if (i == mRepeatAutoStart) {
if (percentBasis != NS_UNCONSTRAINEDSIZE) {
// Use a minimum 1px for the repeat() track-size.
if (trackSize < AppUnitsPerCSSPixel()) {
trackSize = AppUnitsPerCSSPixel();
}
// Use a minimum 1px for the repeat() track-size.
if (trackSize < AppUnitsPerCSSPixel()) {
trackSize = AppUnitsPerCSSPixel();
}
repeatTrackSize = trackSize;
}
sum += trackSize;
}
nscoord gridGap;
float percentSum = 0.0f;
float gridGapPercent;
ResolvePercentSizeParts(aGridGap, percentBasis, &gridGap, &gridGapPercent);
nscoord gridGap = nsLayoutUtils::ResolveGapToLength(aGridGap, aSize);
if (numTracks > 1) {
// Add grid-gaps for all the tracks including the repeat() track.
sum += gridGap * (numTracks - 1);
percentSum = gridGapPercent * (numTracks - 1);
}
// Calculate the max number of tracks that fits without overflow.
nscoord available = maxFill != NS_UNCONSTRAINEDSIZE ? maxFill : aMinSize;
nscoord size = nsLayoutUtils::AddPercents(sum, percentSum);
if (available - size < 0) {
nscoord spaceToFill = available - sum;
if (spaceToFill <= 0) {
// "if any number of repetitions would overflow, then 1 repetition"
return 1;
}
uint32_t numRepeatTracks = 1;
bool exactFit = false;
while (true) {
sum += gridGap + repeatTrackSize;
percentSum += gridGapPercent;
nscoord newSize = nsLayoutUtils::AddPercents(sum, percentSum);
if (newSize <= size) {
// Adding more repeat-tracks won't make forward progress.
return numRepeatTracks;
}
size = newSize;
nscoord remaining = available - size;
exactFit = remaining == 0;
if (remaining >= 0) {
++numRepeatTracks;
}
if (remaining <= 0) {
break;
}
}
if (!exactFit && maxFill == NS_UNCONSTRAINEDSIZE) {
// Calculate the max number of tracks that fits without overflow.
div_t q = div(spaceToFill, repeatTrackSize + gridGap);
// The +1 here is for the one repeat track we already accounted for above.
uint32_t numRepeatTracks = q.quot + 1;
if (q.rem != 0 && maxFill == NS_UNCONSTRAINEDSIZE) {
// "Otherwise, if the grid container has a definite min size in
// the relevant axis, the number of repetitions is the largest possible
// positive integer that fulfills that minimum requirement."
@ -1882,13 +1822,6 @@ struct nsGridContainerFrame::Tracks
WritingMode aWM,
const LogicalSize& aContainerSize);
/**
* Return the intrinsic size by back-computing percentages as:
* IntrinsicSize = SumOfCoordSizes / (1 - SumOfPercentages).
*/
nscoord BackComputedIntrinsicSize(const TrackSizingFunctions& aFunctions,
const nsStyleCoord& aGridGap) const;
nscoord GridLineEdge(uint32_t aLine, GridLineSide aSide) const
{
if (MOZ_UNLIKELY(mSizes.IsEmpty())) {
@ -2198,11 +2131,10 @@ struct MOZ_STACK_CLASS nsGridContainerFrame::GridReflowInput
}
/**
* Calculate our track sizes. If the given aContentBox block-axis size is
* unconstrained, it is assigned to the resulting intrinsic block-axis size.
* Calculate our track sizes.
*/
void CalculateTrackSizes(const Grid& aGrid,
LogicalSize& aContentBox,
const LogicalSize& aContentBox,
SizingConstraint aConstraint);
/**
@ -2688,7 +2620,7 @@ struct MOZ_STACK_CLASS nsGridContainerFrame::Grid
void
nsGridContainerFrame::GridReflowInput::CalculateTrackSizes(
const Grid& aGrid,
LogicalSize& aContentBox,
const LogicalSize& aContentBox,
SizingConstraint aConstraint)
{
mCols.Initialize(mColFunctions, mGridStyle->mGridColumnGap,
@ -2706,12 +2638,6 @@ nsGridContainerFrame::GridReflowInput::CalculateTrackSizes(
mRows.CalculateSizes(*this, mGridItems, mRowFunctions,
aContentBox.BSize(mWM), &GridArea::mRows,
aConstraint);
if (aContentBox.BSize(mWM) == NS_AUTOHEIGHT) {
aContentBox.BSize(mWM) =
mRows.BackComputedIntrinsicSize(mRowFunctions, mGridStyle->mGridRowGap);
mRows.mGridGap =
::ResolveToDefiniteSize(mGridStyle->mGridRowGap, aContentBox.BSize(mWM));
}
}
/**
@ -3813,7 +3739,7 @@ nsGridContainerFrame::Tracks::Initialize(
aFunctions.MinSizingFor(i),
aFunctions.MaxSizingFor(i));
}
mGridGap = ::ResolveToDefiniteSize(aGridGap, aContentBoxSize);
mGridGap = nsLayoutUtils::ResolveGapToLength(aGridGap, aContentBoxSize);
mContentBoxSize = aContentBoxSize;
}
@ -3894,8 +3820,7 @@ ContentContribution(const GridItemInfo& aGridItem,
PhysicalAxis axis(aCBWM.PhysicalAxis(aAxis));
nscoord size = nsLayoutUtils::IntrinsicForAxis(axis, aRC, child, aConstraint,
aPercentageBasis,
aFlags | nsLayoutUtils::BAIL_IF_REFLOW_NEEDED |
nsLayoutUtils::ADD_PERCENTS,
aFlags | nsLayoutUtils::BAIL_IF_REFLOW_NEEDED,
aMinSizeClamp);
if (size == NS_INTRINSIC_WIDTH_UNKNOWN) {
// We need to reflow the child to find its BSize contribution.
@ -3932,15 +3857,7 @@ ContentContribution(const GridItemInfo& aGridItem,
LogicalSize availableSize(childWM, availISize, availBSize);
size = ::MeasuringReflow(child, aState.mReflowInput, aRC, availableSize,
cbSize, iMinSizeClamp, bMinSizeClamp);
nsIFrame::IntrinsicISizeOffsetData offsets = child->IntrinsicBSizeOffsets();
size += offsets.hMargin;
auto percent = offsets.hPctMargin;
if (availBSize == NS_UNCONSTRAINEDSIZE) {
// We always want to add in percent padding too, unless we already did so
// using a resolved column size above.
percent += offsets.hPctPadding;
}
size = nsLayoutUtils::AddPercents(size, percent);
size += child->GetLogicalUsedMargin(childWM).BStartEnd(childWM);
nscoord overflow = size - aMinSizeClamp;
if (MOZ_UNLIKELY(overflow > 0)) {
nscoord contentSize = child->ContentBSize(childWM);
@ -4045,6 +3962,10 @@ MinSize(const GridItemInfo& aGridItem,
return s;
}
if (aCache->mPercentageBasis.isNothing()) {
aCache->mPercentageBasis.emplace(aState.PercentageBasisFor(aAxis, aGridItem));
}
// https://drafts.csswg.org/css-grid/#min-size-auto
// This calculates the min-content contribution from either a definite
// min-width (or min-height depending on aAxis), or the "specified /
@ -4058,7 +3979,8 @@ MinSize(const GridItemInfo& aGridItem,
"baseline offset should be zero when not baseline-aligned");
nscoord sz = aGridItem.mBaselineOffset[aAxis] +
nsLayoutUtils::MinSizeContributionForAxis(axis, aRC, child,
nsLayoutUtils::MIN_ISIZE);
nsLayoutUtils::MIN_ISIZE,
*aCache->mPercentageBasis);
const nsStyleCoord& style = axis == eAxisHorizontal ? stylePos->mMinWidth
: stylePos->mMinHeight;
auto unit = style.GetUnit();
@ -4067,9 +3989,6 @@ MinSize(const GridItemInfo& aGridItem,
child->StyleDisplay()->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE)) {
// Now calculate the "content size" part and return whichever is smaller.
MOZ_ASSERT(unit != eStyleUnit_Enumerated || sz == NS_UNCONSTRAINEDSIZE);
if (aCache->mPercentageBasis.isNothing()) {
aCache->mPercentageBasis.emplace(aState.PercentageBasisFor(aAxis, aGridItem));
}
sz = std::min(sz, ContentContribution(aGridItem, aState, aRC, aCBWM, aAxis,
aCache->mPercentageBasis,
nsLayoutUtils::MIN_ISIZE,
@ -5097,36 +5016,6 @@ nsGridContainerFrame::Tracks::AlignJustifyContent(
MOZ_ASSERT(!roundingError, "we didn't distribute all rounding error?");
}
nscoord
nsGridContainerFrame::Tracks::BackComputedIntrinsicSize(
const TrackSizingFunctions& aFunctions,
const nsStyleCoord& aGridGap) const
{
// Sum up the current sizes (where percentage tracks were treated as 'auto')
// in 'size'.
nscoord size = 0;
for (size_t i = 0, len = mSizes.Length(); i < len; ++i) {
size += mSizes[i].mBase;
}
// Add grid-gap contributions to 'size' and calculate a 'percent' sum.
float percent = 0.0f;
size_t numTracks = mSizes.Length();
if (numTracks > 1) {
const size_t gridGapCount = numTracks - 1;
nscoord gridGapLength;
float gridGapPercent;
if (::GetPercentSizeParts(aGridGap, &gridGapLength, &gridGapPercent)) {
percent = gridGapCount * gridGapPercent;
} else {
gridGapLength = aGridGap.ToLength();
}
size += gridGapCount * gridGapLength;
}
return std::max(0, nsLayoutUtils::AddPercents(size, percent));
}
void
nsGridContainerFrame::LineRange::ToPositionAndLength(
const nsTArray<TrackSize>& aTrackSizes, nscoord* aPos, nscoord* aLength) const
@ -6292,7 +6181,7 @@ nsGridContainerFrame::Reflow(nsPresContext* aPresContext,
LogicalSize computedSize(wm, computedISize, computedBSize);
nscoord consumedBSize = 0;
nscoord bSize;
nscoord bSize = 0;
if (!prevInFlow) {
Grid grid;
grid.PlaceGridItems(gridReflowInput, aReflowInput.ComputedMinSize(),
@ -6300,7 +6189,12 @@ nsGridContainerFrame::Reflow(nsPresContext* aPresContext,
gridReflowInput.CalculateTrackSizes(grid, computedSize,
SizingConstraint::eNoConstraint);
bSize = computedSize.BSize(wm);
// Note: we can't use GridLineEdge here since we haven't calculated
// the rows' mPosition yet (happens in AlignJustifyContent below).
for (const auto& sz : gridReflowInput.mRows.mSizes) {
bSize += sz.mBase;
}
bSize += gridReflowInput.mRows.SumOfGridGaps();
} else {
consumedBSize = GetConsumedBSize();
gridReflowInput.InitializeForContinuation(this, consumedBSize);
@ -6699,8 +6593,14 @@ nsGridContainerFrame::IntrinsicISize(nsRenderingContext* aRenderingContext,
state.mCols.CalculateSizes(state, state.mGridItems, state.mColFunctions,
NS_UNCONSTRAINEDSIZE, &GridArea::mCols,
constraint);
return state.mCols.BackComputedIntrinsicSize(state.mColFunctions,
state.mGridStyle->mGridColumnGap);
state.mCols.mGridGap =
nsLayoutUtils::ResolveGapToLength(state.mGridStyle->mGridColumnGap,
NS_UNCONSTRAINEDSIZE);
nscoord length = 0;
for (const TrackSize& sz : state.mCols.mSizes) {
length += sz.mBase;
}
return length + state.mCols.SumOfGridGaps();
}
nscoord

31
layout/generic/nsIFrame.h
View file

@ -25,6 +25,7 @@
#include "CaretAssociationHint.h"
#include "FrameProperties.h"
#include "LayoutConstants.h"
#include "mozilla/layout/FrameChildList.h"
#include "mozilla/Maybe.h"
#include "mozilla/WritingModes.h"
@ -130,30 +131,12 @@ typedef uint32_t nsSplittableType;
#define NS_FRAME_IS_NOT_SPLITTABLE(type)\
(0 == ((type) & NS_FRAME_SPLITTABLE))
#define NS_INTRINSIC_WIDTH_UNKNOWN nscoord_MIN
//----------------------------------------------------------------------
#define NS_SUBTREE_DIRTY(_frame) \
(((_frame)->GetStateBits() & \
(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN)) != 0)
/**
* Constant used to indicate an unconstrained size.
*
* @see #Reflow()
*/
#define NS_UNCONSTRAINEDSIZE NS_MAXSIZE
#define NS_INTRINSICSIZE NS_UNCONSTRAINEDSIZE
#define NS_AUTOHEIGHT NS_UNCONSTRAINEDSIZE
// +1 is to avoid clamped huge margin values being processed as auto margins
#define NS_AUTOMARGIN (NS_UNCONSTRAINEDSIZE + 1)
#define NS_AUTOOFFSET NS_UNCONSTRAINEDSIZE
// NOTE: there are assumptions all over that these have the same value, namely NS_UNCONSTRAINEDSIZE
// if any are changed to be a value other than NS_UNCONSTRAINEDSIZE
// at least update AdjustComputedHeight/Width and test ad nauseum
// 1 million CSS pixels less than our max app unit measure.
// For reflowing with an "infinite" available inline space per [css-sizing].
// (reflowing with an NS_UNCONSTRAINEDSIZE available inline size isn't allowed
@ -2050,23 +2033,27 @@ public:
/**
* Return the horizontal components of padding, border, and margin
* that contribute to the intrinsic width that applies to the parent.
* @param aPercentageBasis the percentage basis to use for padding/margin -
* i.e. the Containing Block's inline-size
*/
struct IntrinsicISizeOffsetData {
nscoord hPadding, hBorder, hMargin;
float hPctPadding, hPctMargin;
IntrinsicISizeOffsetData()
: hPadding(0), hBorder(0), hMargin(0)
, hPctPadding(0.0f), hPctMargin(0.0f)
{}
};
virtual IntrinsicISizeOffsetData IntrinsicISizeOffsets() = 0;
virtual IntrinsicISizeOffsetData
IntrinsicISizeOffsets(nscoord aPercentageBasis = NS_UNCONSTRAINEDSIZE) = 0;
/**
* Return the bsize components of padding, border, and margin
* that contribute to the intrinsic width that applies to the parent.
* @param aPercentageBasis the percentage basis to use for padding/margin -
* i.e. the Containing Block's inline-size
*/
IntrinsicISizeOffsetData IntrinsicBSizeOffsets();
IntrinsicISizeOffsetData
IntrinsicBSizeOffsets(nscoord aPercentageBasis = NS_UNCONSTRAINEDSIZE);
virtual mozilla::IntrinsicSize GetIntrinsicSize() = 0;